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net: dsa: microchip: Add property to disable reference clock 

Add a new microchip,synclko-disable property which can be specified
to disable the reference clock output from the device if not required
by the board design.

Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Robert Hancock 2022-01-27 10:41:56 -06:00 committed by David S. Miller
parent eccfecfe58
commit 48bf8b8a04
3 changed files with 13 additions and 3 deletions
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9
drivers/net/dsa/microchip/ksz9477.c
View File

@ -222,9 +222,12 @@ static int ksz9477_reset_switch(struct ksz_device *dev)
(BROADCAST_STORM_VALUE *
BROADCAST_STORM_PROT_RATE) / 100);
if (dev->synclko_125)
ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1,
SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ);
data8 = SW_ENABLE_REFCLKO;
if (dev->synclko_disable)
data8 = 0;
else if (dev->synclko_125)
data8 = SW_ENABLE_REFCLKO | SW_REFCLKO_IS_125MHZ;
ksz_write8(dev, REG_SW_GLOBAL_OUTPUT_CTRL__1, data8);
return 0;
}

6
drivers/net/dsa/microchip/ksz_common.c
View File

@ -434,6 +434,12 @@ int ksz_switch_register(struct ksz_device *dev,
}
dev->synclko_125 = of_property_read_bool(dev->dev->of_node,
"microchip,synclko-125");
dev->synclko_disable = of_property_read_bool(dev->dev->of_node,
"microchip,synclko-disable");
if (dev->synclko_125 && dev->synclko_disable) {
dev_err(dev->dev, "inconsistent synclko settings\n");
return -EINVAL;
}
}
ret = dsa_register_switch(dev->ds);

1
drivers/net/dsa/microchip/ksz_common.h
View File

@ -75,6 +75,7 @@ struct ksz_device {
u32 regs_size;
bool phy_errata_9477;
bool synclko_125;
bool synclko_disable;
struct vlan_table *vlan_cache;